When I played a lot I was part of a pretty badass clan. We would generally kick everyones ass, no questions asked.
We all had similar character builds which were: almost fully upgraded medpack, fully upgraded LMG skills, and then some other skills of your choice.
I was mainly a gunner, but I did a lot of sniping and spotting if the need arises. I remember an amazing match we had once where our other sniper/spotter setup in quite a nice position overlooking the path enemies run up from.
He was using a lower caliber rifle with a silencer to help conceal his position and he just sat there the match spotting for the rest of us, and strategically eliminating some targets that A.) had us pinned under fire or B.) were waiting for us.
We ended up winning that match and many more like it.
God I had some good times on this game. Met a lot of cool people on it, some of which even months later I would strike up a conversation with, maybe play a game or two here and there.
(also we pummeled sver on a regular basis in smaller gamemodes, just sayin')